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using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
namespace WpfBitmapWB
{
/// <summary>
/// Logique d'interaction pour UserControl1.xaml
/// </summary>
public partial class UserControl1 : UserControl
{
private static WriteableBitmap writeableBitmap = null;
// et son infrastructure
private static Int32Rect rect;
private static int bytesPerPixel;
private static int stride;
private static int arraySize;
private static byte[] colorArray;
// infrastructure pour l'ellipse curseur
private static Int32Rect ellipseRect;
private static int ellipseSize;
private static byte[] colorEllipse;
// infrastructure pour l'ellipse jumelle "GOMME"
private static Int32Rect ellipseRectBack;
private static byte[] colorEllipseBack;
public UserControl1()
{
InitializeComponent();
writeableBitmap = new WriteableBitmap((int)this.chart.Width, (int)this.chart.Height, 96, 96, PixelFormats.Bgra32, null);
rect = new Int32Rect(0, 0, writeableBitmap.PixelWidth, writeableBitmap.PixelHeight);
bytesPerPixel = (writeableBitmap.Format.BitsPerPixel + 7) / 8;
stride = writeableBitmap.PixelWidth * bytesPerPixel;
arraySize = stride * writeableBitmap.PixelHeight;
colorArray = new byte[arraySize];
// OPTION 1
//CreateBmpEllipse();
// OPTION 2-commentée
//CreatetBmpDrawingGroup();
//Init random source
random.Source = writeableBitmap;
}
private void chart_PreviewMouseMove(object sender, MouseEventArgs e)
{
Point hitPoint = e.GetPosition(this.random);
Rect cliquableRect = new Rect(0, 0,
this.random.Width - ellipseRect.Width - 1,
this.random.Height - ellipseRect.Height - 1);
if (e.LeftButton == MouseButtonState.Pressed && cliquableRect.Contains(hitPoint ))
{
ellipseRectBack = ellipseRect; // Memorise le previous rect
//ellipseRect.X = (int)hitPoint.X - ellipseRect.Width-1; // centrage par rapport position souris
//ellipseRect.Y = (int)hitPoint.Y - ellipseRect.Height-1;
ellipseRect.X = (int)hitPoint.X ;
ellipseRect.Y = (int)hitPoint.Y ;
UpdatePixels();
// Maj du control Image
random.Source = writeableBitmap;
}
}
private static void UpdatePixels()
{
// on "gomme"
writeableBitmap.WritePixels(ellipseRectBack, colorEllipseBack, stride, 0);
// track la position souris
writeableBitmap.WritePixels(ellipseRect, colorEllipse, stride, 0);
}
// OPTION 1
private void CreateBmpEllipse()
{
Pen stroke = new Pen(Brushes.Red, 2.0);
Rect horizBounds = new Rect(0, 0, 100, 60);
Rect vertBounds = new Rect(0, 0, 60, 100);
Point center = new Point(50, 30);
DrawingVisual dv = new DrawingVisual();
DrawingContext ctx = dv.RenderOpen();
ctx.PushOpacity(0.5);
ctx.DrawEllipse(Brushes.Yellow, stroke, center, horizBounds.Width / 2, horizBounds.Height / 2);
ctx.DrawEllipse(Brushes.DarkBlue, stroke, center, vertBounds.Width / 2, vertBounds.Height / 2);
ctx.Pop();
ctx.Close();
RenderTargetBitmap bmp = new RenderTargetBitmap( (int)vertBounds.Width, (int)vertBounds.Height, 96, 96, PixelFormats.Pbgra32);
bmp.Render(dv);
ellipseRect = new Int32Rect(0, 0, bmp.PixelWidth, bmp.PixelHeight);
bytesPerPixel = (bmp.Format.BitsPerPixel + 7) / 8;
stride = bmp.PixelWidth * bytesPerPixel;
ellipseSize = stride * bmp.PixelHeight;
colorEllipse = new byte[ellipseSize];
// init gomme
ellipseRectBack = ellipseRect;
colorEllipseBack = new byte[ellipseSize];
bmp.CopyPixels(ellipseRect, colorEllipse, stride, 0);
}
// OPTION 2
private void CreatetBmpDrawingGroup()
{
DrawingGroup dwg = this.FindResource("dwg") as DrawingGroup;
DrawingVisual dv = new DrawingVisual();
using (DrawingContext ctx = dv.RenderOpen())
{
foreach (var item in dwg.Children)
{
ctx.DrawDrawing(item );
}
}
Rect bounds = dv.ContentBounds ;
RenderTargetBitmap bmp = new RenderTargetBitmap((int)bounds.Width, (int)bounds.Height, 96, 96, PixelFormats.Pbgra32);
bmp.Render(dv);
ellipseRect = new Int32Rect(0, 0, bmp.PixelWidth, bmp.PixelHeight);
bytesPerPixel = (bmp.Format.BitsPerPixel + 7) / 8;
stride = bmp.PixelWidth * bytesPerPixel;
ellipseSize = stride * bmp.PixelHeight;
colorEllipse = new byte[ellipseSize];
// init gomme
ellipseRectBack = ellipseRect;
colorEllipseBack = new byte[ellipseSize];
bmp.CopyPixels(ellipseRect, colorEllipse, stride, 0);
}
private void button1_Click(object sender, RoutedEventArgs e)
{
MessageBox.Show("button 1");
}
private void button2_Click(object sender, RoutedEventArgs e)
{
MessageBox.Show("button 2");
}
private void rectangle1_MouseDown(object sender, MouseButtonEventArgs e)
{
MessageBox.Show("rectangle 1");
}
private void ellipse1_MouseDown(object sender, MouseButtonEventArgs e)
{
MessageBox.Show("ellipse 1");
}
}
} |
WPF Ne pas intercepter les events souris
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